# GlockApps alternatives: what AI models name instead, October 2026

GTM AI Recommendation Index, October 2026 Edition. 133 of the 252 answers in the 1 category where GlockApps holds a standing named it neither first nor as an alternative; these are the first choices those answers made. Page: https://gtm-ai-index.com/vendors/glockapps/alternatives/

## Named instead, most often (every category and segment added)

- Validity Everest: 12
- Google Postmaster Tools: 10
- MXToolbox: 5
- Mail-Tester: 5
- Microsoft SNDS: 5
- Folderly: 4

## Email deliverability and testing tools

**Small business**: 46 of 84 answers did not name GlockApps (GlockApps is #1 of 15 at 24%).

- Google Postmaster Tools: first choice in 7 of those 46
- Litmus: first choice in 4 of those 46
- Mail-Tester: first choice in 4 of those 46
- MXToolbox: first choice in 3 of those 46
- MailerCheck: first choice in 3 of those 46
- Microsoft SNDS: first choice in 3 of those 46
- Email on Acid: first choice in 2 of those 46
- Folderly: first choice in 2 of those 46

**Mid-market**: 36 of 84 answers did not name GlockApps (GlockApps is #1 of 12 at 34%).

- Google Postmaster Tools: first choice in 3 of those 36
- MXToolbox: first choice in 2 of those 36
- Microsoft SNDS: first choice in 2 of those 36
- Yahoo Sender Hub: first choice in 2 of those 36
- EmailListVerify: first choice in 1 of those 36
- Folderly: first choice in 1 of those 36
- Mail-Tester: first choice in 1 of those 36
- MailReach: first choice in 1 of those 36

**Enterprise**: 51 of 84 answers did not name GlockApps (GlockApps is #5 of 14 at 2%).

- Validity Everest: first choice in 12 of those 51
- Mailgun: first choice in 3 of those 51
- Everest: first choice in 2 of those 51
- Instantly: first choice in 2 of those 51
- SendGrid: first choice in 2 of those 51
- Sender: first choice in 2 of those 51
- Validity Engage: first choice in 2 of those 51
- Folderly: first choice in 1 of those 51

Published under CC BY 4.0. The output is the models' output; nothing here is a recommendation by the index.